Hi,

Anthony and Robert, how can you monitor the OSD client and replication
traffic separately, e.g. in grafana?
It has often helped me with error analysis.
Joachim

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Am Fr., 14. Nov. 2025 um 14:13 Uhr schrieb Anthony D'Atri <
[email protected]>:

>
>
> > On Nov 14, 2025, at 4:37 AM, Robert Sander <[email protected]>
> wrote:
> >
> > Hi,
> >
> > Am 14.11.25 um 9:44 AM schrieb Alexander Leutz:
> >
> >> Ceph is my storage, also I name the communication as storage network.
> >> The proxmox ceph servers has 2 1Gb management ports an 2 10 Gb ports
> for storage network.
> >> I set the mon public and the osd cluster networks to the privat IP
> range 10.10.x.x:
> >> ceph config set mon public_network 10.10.x.x/24
> >> ceph config set osd cluster_network 10.10.x.x/24
> >
> > In your case I would not setup a separate cluster network.
>
> Indeed.  To be clear, Alexander, do you have those two 10GE ports bonded?
> If so, then I agree with Herr Sander that there is no benefit to defining
> the cluster_network, and indeed you may be confusing code by doing so.  The
> cluster network should only be defined if it's *different* from the public
> network.  The public network is how clients communicate with the Ceph
> cluster.  If there's a cluster_network, it is only used for internal
> replication and heartbeating within Ceph.
>
> > It is optional and only recommended if you have a network that is at
> least twice as fast as the public network.
>
> Well, say someone has two dual-port 10GE NICs in each system.  They could
> either bond all four together (which I *think* works but haven't tried) for
> a public network, or bond one port on each NIC together for the public, and
> one on each for the private network.
>
> I do usually recommend that people not bother with a cluster network if
> they're using 25GE or better, especially with very dense nodes.
>
>
>
> >
> >> After this I only see this as paramter in the GUI screen, under host /
> ceph / configuration in the section Configuration Database
> >> Und [global] I still see a second entry named public_network =
> 192.168.x.x (this is my management network of the proxmox host).
> >
> > Change in the config db do not get written to the ceph.conf file.
>
> I think he's writing about the Dashboard, not ceph.conf
>
> >
> > You can remove this setting from the ceph.conf file by using an editor
> as it is now in the config db.
>
> If it's in ceph.conf, then absolutely.  All you need in there is the mon
> information, maybe the fsid.
>
> >
> > Regards
> > --
> > Robert Sander
> > Linux Consultant
> >
> > Heinlein Consulting GmbH
> > Schwedter Str. 8/9b, 10119 Berlin
> >
> > https://www.heinlein-support.de
> >
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> > Fax: +49 30 405051 - 19
> >
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